The boy allegedly made bomb threats on the school’s answering machine, forcing the school into lockdown for more than an hour and parents dropping off students turned away.

He has been charged with making a bomb hoax, and using a carriage service to make a threat and menace, harass and cause offence.

Students weren’t allowed inside the school grounds if they hadn’t been dropped off yet. Picture: Jason O'BrienSource:News Corp Australia

Police were called to the school at 8.40am Queensland time, with some parents unable to leave the school grounds when it into lockdown.

Officers also reportedly attended the nearby Helensvale High School as a precautionary measure.

Parents reportedly received a text message at 8.50am telling them to stay home if they had no already left.

But many are outraged they didn’t receive anything. It’s the second time the school has been thrown into lockdown in recent weeks, after students were stuck for four hours when phone threats were made on February 19.

In that incident, two calls were also made to the school’s answering service.

It follows a similar incident last month that left parents worried for their children inside. Picture: Jason O'BrienSource:News Corp Australia

One mum took to Facebook after this week’s incident to say the lockdowns were becoming too frequent.

“I arrived to drop the kids off just as the lockdown alarm sounded and so they weren’t allowed in,” she said.

“Nana to the rescue so I could go to work as lockdown lasted 3 hours.

“I won’t sugar-coat it, driving my kids away from their school while van after van of armed police arrived under lights and sirens was an eye opener.

“Our kids should be safe at school but in reality they aren’t.

“Also no text was received and it took the school until 10.30am to email. Social Media was reporting on it well before the school did. Disappointing!”

Another mum told news.com.au she was extremely annoyed by similar incidents happening “all the time”.

“I have one daughter in prep very scared to go to school,” she said.

Police have swarmed the school twice in recent weeks.Source:Supplied

Others said how terrifying it was for children and “scary times we are living in”.

“It’s getting a bit out of hand now! Getting sick of it and the poor kids at school and parents that are scared for their children’s well being,” wrote another.

One mother told the Gold Coast Bulletin a number of parents and younger siblings sat under tables and played on iPads.

“It was pretty scary when the first alarm went off, they didn’t tell us what was happening,” she said.

Last month, four students at Helensvale State High School claimed they were slashed by a razor blade by a student in their class.

Parents were furious the school did not notify them of the alleged attack, 9 News Gold Coast reported.